Door-latch-operating device.



Patented Mar. ll, I902.

T. G. LESLIE.

DOOR LATCHU'PERATING- DEVICE.

(Application filed July 13, 1901.)

(No Model.)

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THOMAS G. LESLIE, OF EAST MELBOURNE, VICTORIA, AUSTRALIA.

DOOR-=-LATCH=-OPERATlNG DEVICE.

SPECIFICATION forming part of Letters Patent No. 695,319, dated March 11, 1902.

Application filed July 13,1901. Serial No. 68,179. (No model.)

To all whom it may concern:

Be it known that LTHOMAS G. LEsLIE,a subject of the King of Great Britain, and a resident of East Melbourne, Victoria, Australia, have invented a new and Improved Door- Latch-Operating Device, of which the following is a full, clear, and exact description.

This invention has for its object to provide a means for mounting door-knobs by which the knobs will be held more securely and prevented from becoming loose on or detached from the spindle.

This specification is a specific description of one form of the invention,while the claim is a definition of the actual scope thereof.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is an elevation of the invention applied to a door, parts being broken away and in section. Fig. 2 is a sectional elevation on the line 2 2 of Fig. 1. Fig. 3 is a side View of the bearing-annulus which I employ, and Fig. I is a view illustrating the preferred manner of threading the latch-spindle.

(t represents an ordinary door-lock provided with a bolt a under the control of the spindle (L This spindle has its ends projected beyond the door to which the latch is applied, and these ends are threaded oppositely, as shown clearly in Fig. 4.

1) represents the door knobs, which are formed rigid with the shanks b and roses or escutcheons 13 These parts I), b, and b are preferably formed integral, as shown; but the spirit of my invention will not be departed from if they are built up of various sections. They should, however, constitute when finished a single rigid part.

Fastened to each side of the door and surrounding the spindle a in concentric relation thereto is a bearing-annulus 0. Against these annuli the roses or escutcheons Z2 bear so as to turn thereon, and this turning movement is limited by pins or screws d, carried rigidly on the door and projecting through the annuli 0, these pins or screws fitting loosely in arc-shaped slots b formed in the roses 1) of the knobs Z). The slots 1) are of such length that, they will allow the knobs the movement necessary for throwing the bolt to of the latch or look a.

In assembling the parts the knobs are screwed up on the ends of the spindle a until .the roses or escutcheons b bear snugly against the annuli c, and the pins 01 are projected, respectively, through the slots b and through the holes in the annuli, thus holding the annuli firmly in position. Now by these means the knobs are mounted securely in place and areallowed just sufficient movement to operate the latch. Idle movement is. avoided, and owing to the arrangement of the threads on the spindle the natural operation of the parts tends continually to tighten the knobs on'the spindles.

Various changes in the form, proportions, and minor details'of my invention may be resorted to without departing from the spirit and scope of my invention. 1 Hence I consider myself entitled to all such variations as may lie within the scope of my claim.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- The combination with a door of a lock-spindle mounted to turn therein, a knob fastened on each end of the spindle, an annulus fastenedto each side of the door, and having the knobs bearing respectively against them, and a pin projecting beyond each annulus, said pins fittingloosely in slots in the knobs to limit'the turning movement of the knobs.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

THOMAS G. LESLIE.

Witnesses:

JOHN MILLAR, "CHARLES Asknw. 

